US1993944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Defoaming apparatus
Assignee: Individual
•
Filing: 1933-09-19
•
Granted: 1935-03-12
•
Expires: 1953-09-19
Abstract
No abstract record available.
Inventors
- 👤 David D Peebles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:27
CPC Classifications
C; C13; C13B; C13B25/00; C13B25/02; B; B01; B01D; B01D19/00; B01D19/02; Y; Y10; Y10S; Y10S159/00; Y10S159/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1938-03-11 | 1938-09-10 | 1939-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-03-11 | 1942-09-10 | 1943-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-03-11 | 1946-09-10 | 1947-03-12 | $7700.00 | Window Closed / Lapsed |